Used TableView form ensemble and used a SortedList.

An Exception occurs. It is clear that it is a problem to compare objects which are not comparable, but it should not happen that the application does not start. Why not using a default object comparator in that case?


Exception

SEVERE: javafx.scene.control.Control loadSkinClass Failed to load skin 'com.sun.javafx.scene.control.skin.TableViewSkin' for control TableView@41d05d[styleClass=table-view]
java.lang.ClassCastException: Cannot use natural comparison as underlying list contains element(s) that are not Comparable
at javafx.collections.SortedList.size(SortedList.java:290)
at com.sun.javafx.scene.control.skin.TableViewSkin.getItemCount(TableViewSkin.java:345)
at com.sun.javafx.scene.control.skin.TableViewSkin.updatePlaceholderRegionVisibility(TableViewSkin.java:302)
at com.sun.javafx.scene.control.skin.TableViewSkin.updateVisibleColumnCount(TableViewSkin.java:275)
at com.sun.javafx.scene.control.skin.TableViewSkin.<init>(TableViewSkin.java:93)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
at javafx.scene.control.Control.loadSkinClass(Control.java:690)
at javafx.scene.control.Control.impl_cssSet(Control.java:761)
at javafx.scene.Node.impl_cssSet(Node.java:5448)
at com.sun.javafx.css.StyleHelper.transitionToState(StyleHelper.java:280)
at javafx.scene.Node.impl_processCSS(Node.java:5375)
at javafx.scene.Parent.impl_processCSS(Parent.java:943)
at javafx.scene.control.Control.impl_processCSS(Control.java:783)
at javafx.scene.Parent.impl_processCSS(Parent.java:950)
at javafx.stage.Window.impl_visibleChanging(Window.java:554)
at javafx.stage.Stage.impl_visibleChanging(Stage.java:481)
at javafx.stage.Window$12.invalidated(Window.java:462)
at javafx.beans.property.BooleanPropertyBase.markInvalid(BooleanPropertyBase.java:62)
at javafx.beans.property.BooleanPropertyBase.set(BooleanPropertyBase.java:116)
at javafx.stage.Window.setVisible(Window.java:534)
at javafx.stage.Stage.setVisible(Stage.java:105)
at com.sibvisions.javafx.TableSample.start(TableSample.java:65)
at com.sun.javafx.application.LauncherImpl$3.run(LauncherImpl.java:130)
at com.sun.javafx.application.PlatformImpl$3.run(PlatformImpl.java:87)
at com.sun.javafx.application.PlatformImpl$2.run(PlatformImpl.java:65)
at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
at com.sun.glass.ui.win.WinApplication.access$100(WinApplication.java:29)
at com.sun.glass.ui.win.WinApplication$1$1.run(WinApplication.java:49)
at java.lang.Thread.run(Thread.java:619)


Example:

    public static void main(String[] args) {
        Application.launch(args);
    }

    @SuppressWarnings("unchecked")
@Override
    public void start(Stage pStage)
    {
        final ObservableList<Person> data = FXCollections.observableArrayList(
                new Person("Jacob", "Smith", "jacob.smith@example.com" ),
                new Person("Isabella", "Johnson", "isabella.johnson@example.com" ),
                new Person("Ethan", "Williams", "ethan.williams@example.com" ),
                new Person("Emma", "Jones", "emma.jones@example.com" ),
                new Person("Michael", "Brown", "michael.brown@example.com" )
            );
            TableColumn<String> firstNameCol = new TableColumn<String>();
            firstNameCol.setText("First");
            firstNameCol.setDataRetriever(new Callback<TableColumn.CellDataFeatures<String>, String>() {
                @Override public String call(CellDataFeatures<String> p) {
                    return ((Person)p.getValue()).firstName;
                }
            });
            TableColumn lastNameCol = new TableColumn();
            lastNameCol.setText("Last");
            lastNameCol.setDataRetriever(new Callback<TableColumn.CellDataFeatures<String>, String>() {
                @Override public String call(CellDataFeatures<String> p) {
                    return ((Person)p.getValue()).lastName;
                }
            });
            TableColumn emailCol = new TableColumn();
            emailCol.setText("Email");
            emailCol.setMinWidth(200);
            emailCol.setDataRetriever(new Callback<TableColumn.CellDataFeatures<String>, String>() {
                @Override public String call(CellDataFeatures<String> p) {
                    return ((Person)p.getValue()).email;
                }
            });
        TableView tableView = new TableView();
        tableView.setItems(new SortedList(data));
        tableView.getColumns().addAll(firstNameCol, lastNameCol, emailCol);
        
        BorderPane bpane = new BorderPane();
        bpane.setCenter(tableView);
        
        Scene scene = new Scene(bpane);

        pStage.setScene(scene);
        pStage.setVisible(true);
        pStage.setFocused(true);
    }

    public static class Person {
        String firstName;
        String lastName;
        String email;

        private Person(String fName, String lName, String email) {
            this.firstName = fName;
            this.lastName = lName;
            this.email = email;
        }
    }